too further add to Mr Toda Party…the weigh deferences will be in the muffler itself and whether or not the midpipe is resonated…to be honest aftermarket catbacks on a lightly modified NA car are all about sound and in this case my opinion is the SP2 sounds better than the EVO exhaust…but thats me i dont like loud pipes…go figure my car is loud and annoying…the SP2 will sound a tad louder than stock at idle and a bit louder whne ur on the gas…its stupid quiet